Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS4500313 A
Publication typeGrant
Application numberUS 06/461,564
Publication dateFeb 19, 1985
Filing dateJan 27, 1983
Priority dateJan 27, 1983
Fee statusLapsed
Publication number06461564, 461564, US 4500313 A, US 4500313A, US-A-4500313, US4500313 A, US4500313A
InventorsDavid E. Young
Original AssigneeProtectair Limited
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Urethral catheter
US 4500313 A
Abstract
The catheter includes an inner tubular member and an outer sleeve member into which the inner tubular member is freely movably received. The inner tubular member has a section with calibrated markings. The calibrated section is spaced from the end adapted to be received in the urethra, by a distance equal to the length of the outer sleeve member. The outer sleeve member has an outwardly flared end adapted to be situated adjacent the external urethral meatus. The non-flared end of the sleeve member is used as a pointer against the calibrated markings to determine the length of the urethra.
Images(1)
Previous page
Next page
Claims(7)
I claim:
1. A catheter comprising an inner tubular member having an end portion with an opening, said end portion being adapted to be received in the urethra and an outer sleeve member into which said inner tubular member is freely movably received, said outer sleeve member having an enlarged end adapted to be situated adjacent the external urethral meatus, said inner tubular member comprising a section comprising calibration markings thereon, said calibration section being spaced from said opening in said end portion a distance substantially equal to the length of said outer tubular member.
2. The catheter of claim 1, wherein said sleeve member has a tubular portion and wherein said flared end comprises a part comprising first and second sections, said first section having a substantially cylindrical shape and being affixed to said tubular portion of said outer sleeve member, said second section having a substantially conical portion and being affixed to said first section.
3. The catheter of claim 2, wherein said second section further comprises a substantially cylindrical rim on said conical portion.
4. The catheter of claim 1, further comprising means for operably engaging a tube, said engaging means being located at the other end of said inner tubular member.
5. The catheter of claim 4, wherein said engaging means comprises means adapted to be inserted into and frictionally engage the opening in a tube.
6. The catheter of claim 5, wherein said engaging means comprises means for limiting insertion of said frictional engaging means into the opening in the tube beyond a given distance.
7. The catheter of claim 1, wherein said outer sleeve member comprises a tubular portion.
Description

The present invention relates to medical instruments and, more particularly, to an improved urethral catheter primarily designed for use in urodynamic procedures.

A catheter is a slender tube made of rigid or flexible material designed to be inserted into a body cavity for distending a passage or drawing off fluid. For example, a catheter may be inserted into the urethra and used to draw urine from the bladder.

During certain urodynamic procedures, a catheter is inserted into the urethra and, thereafter, moved within the urethra until the end thereof is aligned with the neck or opening in the bladder. The depth of insertion may be measured to ascertain the effective length of the urethra.

In certain procedures for measuring incontinence in women, a catheter equipped with calibration markings at the insertion end is utilized. The catheter is moved up the urethra until fluid begins to flow through the tube. This position identifies the bladder neck and the urethral length can be read from the calibration marks.

Since the catheter is handled during this procedure, during insertion and while the catheter is moved up and down the urethra, the sterility of the catheter is often compromised. Accordingly, the risk of infection is present.

Moreover, it is often difficult to obtain an accurate reading from the calibration marks on the catheter when same are adjacent the insertion end of the catheter. This is because of the flexibility of the external urethral meatus and because the view of the calibrated markings may be obscured by the labia.

The above noted disadvantages are overcome by the improved urethral catheter of the present invention. As described in detail below, the improved urethral catheter of the present invention includes an outer sleeve, in the form of a tubular member, into which the inner tubular member is freely movably received. Thus, the person performing the catheterization need not touch or come into contact with the portion of the inner tubular member which is inserted into the urethra. Consequently, the sterility of the portion of the inner tubular member which is inserted into the urethra is maintained.

Accurately measuring the urethral length is facilitated by spacing the calibrated portion of the inner tube from the insertion end by a distance equal to the length of the outer sleeve. The outer sleeve is provided with a flared end adapted to be positioned against the external urethral meatus. After the inner tubular member is positioned within the urethra, the measurement is read by the position of the non-flared end of the sleeve along the calibrated section of the inner tubular member. Consequently, the measurement can be taken with increased accuracy and ease.

It is, therefore, a prime object of the present invention to provide an improved urethral catheter capable of substantially reducing the risk of injection during urodynamic procedures by maintaining the sterility of the portion thereof inserted into the urethra.

It is another object of the present invention to provide an improved urethral catheter wherein measurements of distance can be performed with increased accuracy and ease.

It is another object of the present invention to provide an improved urethral catheter which is simple in design, easy to use, and inexpensive to manufacture.

In accordance with the present invention, a catheter is provided comprising an inner tubular member having an end adapted to be received in the urethra and an outer sleeve member into which the inner tubular member is freely movably received. The outer sleeve member has an outwardly flared end adapted to be situated adjacent the external urethra meatus.

The inner tubular member comprises a section, spaced from the inner tubular member end, comprising calibration markings thereon. The length of the outer sleeve member is substantially equal to the distance between the inner tubular member end and the calibrated section.

The flared end of the outer sleeve member comprises a part including first and second sections. The first section has a substantially cylindrical shape and is affixed to the tubular portion of the outer sleeve member. The second section has a substantially conical portion and is affixed to the first section. The second section also comprises a substantially cylindrical portion at the wide end of the conical portion.

Means for operably engaging a drain tube or the like is located at the end of the inner tubular member opposite the end adapted to be inserted in the urethra. The engaging means comprises means adapted to be inserted into and frictionally engage the opening in the tube. The engaging means also includes means for preventing the insertion of the frictionally engaging means into the opening in the tube beyond a given length.

To these and such other objects which may hereinafter appear, the present invention relates to an improved urethral catheter as described in the following specification and recited in the annexed claims, taken together with the accompanying drawings wherein like numerals refer to like parts and in which:

FIG. 1 is a perspective view of the improved urethral catheter of the present invention; and

FIG. 2 is a schematic drawing illustrating the method of use of the improved urethral catheter of the present invention.

As illustrated in FIG. 1, the improved urethral catheter of the present invention includes an inner tubular member 10, preferably composed of flexible plastic or the like. Inner tubular member 10 has an end 12 adapted to be inserted into the urethra and an end 14 adapted to be affixed to a drain tube or the like. Approximately mid-way between ends 12 and 14 is a section 16 which contains calibration markings, shown here as the numbers 1-10. End 14 of tubular member A is provided with a means for frictionally engaging the opening of a drain tube (not shown in this Figure). This engaging means includes a hollow substantially cylindrical section 18 having an outer diameter approximately equal to the inner diameter of the drain tube, into which it is adapted to be received. Limit means 19, in the form of a flange or annular member, is situated on section 18 so as to limit the distance which section 18 can be inserted into the drain tube.

Inner tubular member 10 is freely movably received within an outer sleeve member 20, preferably composed of a plastic somewhat more rigid than the plastic of which inner tubular member 10 is composed. Affixed to one end of sleeve 20 is an outwardly or radially flared part. The flared part includes a generally cylindrical section 22 affixed to the tubular part 24 of sleeve 20 and a substantially conical portion 26 having a hollow or concave face or interior and a generally cylindrical rim 28.

The method of use of the improved urethral catheter of the present invention is illustrated in FIG. 2 wherein the cavity at the left side of the drawing labelled 30 is intended to schematically represent the bladder and the channel connected thereto and labelled 32 schematically represents the urethra. When a urodynamic procedure must be performed which entails the insertion of a catheter into the bladder, the flared portion 26 of sleeve 20 is held by the person performing the catherization adjacent to the external urethral meatus while the labia are held apart. The end 12 of the inner tubular member 10 is then inserted into the urethra and pushed into the bladder by feeding it into the non-flared end of sleeve 20.

If a Fluid Bridge (Flow) test is being performed, end 12 of the inner tubular member is inserted into the urethra such that fluid begins to flow through the inner tubular member 10 and the drain tube 34 attached to end 14 thereof. End 12 is then slowly withdrawn until fluid ceases to flow through the tube. At this point, the end 12 of inner tubular member 10 is positioned at the bladder neck. The length of the urethra is then read from the calibration marks along section 16 of inner tubular member 10 by using the non-flared end of sleeve 20 as a pointer against the calibrated markings. For example, if one were reading the markings of the catheter shown in FIG. 1, it would read approximately 41/2 cm.

As now will be appreciated, the improved urethral catheter of the present invention has several major advantages over conventional catheters of this type. First, the hands of the person performing the test never need come into contact with the sterile inner tubular member, thereby substantially reducing the risk of infection. Second, the improved urethral catheter of the present invention provides a more accurate reading and provides a calibration scale which is much more easily visually accessible. In addition, the improved urethral catheter of the present invention has a very simple design, is easy to use, and is inexpensive to manufacture.

While only a single preferred embodiment of the present invention has been disclosed for purposes of illustration, it is obvious that many modifications and variations could be made thereto. It is intended to cover all of these variations and modifications which fall within the scope of the present invention, as defined by the following claims

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3796211 *Aug 7, 1972Mar 12, 1974Medics Res & Dev IncBiopsy sampling method and device for the female genital tract
US4224951 *Nov 30, 1978Sep 30, 1980Hasson Harrith MGynecological instrument
NL7902339A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4612939 *Oct 15, 1984Sep 23, 1986Robertson Jack RMethod for diagnosis of stress incontinence in women
US4784638 *Sep 17, 1987Nov 15, 1988Neurodynamics, Inc.Angled hole ventricular catheter and method of making same
US4863423 *Mar 23, 1988Sep 5, 1989H. G. Wallace Ltd.Catheter and cannula assembly
US4921485 *Sep 28, 1988May 1, 1990Griffiths John DCatheter for use in the surgical correction of a nasolacrimal duct obstruction
US5004456 *Mar 10, 1989Apr 2, 1991Arrow International Investment CorporationIn-dwelling catheter
US5010892 *May 4, 1988Apr 30, 1991Triangle Research And Development Corp.Body lumen measuring instrument
US5034009 *Aug 22, 1989Jul 23, 1991Mouchel Jack A PInstrument for locating the proximal end of the urethra
US5062831 *Apr 18, 1990Nov 5, 1991Griffiths John DCatheter for use in the surgical correction of a nasolacrimal duct obstruction
US5084022 *Oct 4, 1989Jan 28, 1992Lake Region Manufacturing Company, Inc.Graduated guidewire
US5180387 *Nov 2, 1988Jan 19, 1993Neurodynamics, Inc.Angled hole ventricular catheter with non-circular bore
US5257972 *Dec 4, 1992Nov 2, 1993Simon GurmarnikDevice for and method of length determination of epidural anesthesia catheter
US5343874 *May 18, 1993Sep 6, 1994Applied Medical Technology, Inc.Tract measuring device
US5356382 *Oct 23, 1992Oct 18, 1994Applied Medical Research, Inc.Percutaneous tract measuring and forming device
US5611778 *May 12, 1993Mar 18, 1997VygonSurgical instrument for performing epidural anesthesia
US5657764 *Aug 30, 1995Aug 19, 1997Uromed CorporationDevice and method for determining the length of a urethra
US5921952 *Aug 14, 1997Jul 13, 1999Boston Scientific CorporationDrainage catheter delivery system
US6248100May 14, 1999Jun 19, 2001Scimed Life Systems, Inc.Drainage catheter delivery system
US6264624Feb 25, 1999Jul 24, 2001Boston Scientific CoporationDrainage catheter delivery system
US6273895May 18, 2000Aug 14, 2001Corvita CorporationMethod of measuring a body cavity
US6395003Sep 7, 1999May 28, 2002Asahi Kogaku Kogyo Kabushiki KaishaDrainage tube indwelling device for endoscope
US6524259 *Jun 8, 2001Feb 25, 2003Cervilenz, Inc.Devices and methods for cervix measurement
US6527702Jan 26, 2001Mar 4, 2003Abbeymoor Medical, Inc.Urinary flow control device and method
US6527737 *Jan 24, 2001Mar 4, 2003Tatsuo KaneshigeIndwelling urethra catheter
US6562024May 11, 2001May 13, 2003Scimed Life Systems, Inc.Drainage catheter delivery system
US6719709Aug 31, 2001Apr 13, 2004Abbeymoor Medical, Inc.Diagnostic urethral assembly and method
US6802817Feb 12, 2003Oct 12, 2004Cervilenz, Inc.Devices and methods for cervix measurement
US6991596Oct 18, 2002Jan 31, 2006Abbeymoor Medical, Inc.Endourethral device and method
US6994678Aug 23, 2004Feb 7, 2006Cervilenz, Inc.Devices and methods for cervix measurement
US7001327Mar 4, 2003Feb 21, 2006Abbeymoor Medical, Inc.Urinary flow control device and method
US7048698 *Jun 24, 2002May 23, 2006Abbeymoor Medical, Inc.Urethral profiling device and methodology
US7108655Jan 23, 2002Sep 19, 2006Abbeymoor Medical, Inc.Endourethral device and method
US7141038Aug 7, 2001Nov 28, 2006Abbeymoor Medical, Inc.Endourethral device and method
US7390324Apr 15, 2003Jun 24, 2008Abbeymoor Medical, Inc.Magnetic retrieval device and method of use
US8366640Nov 11, 2010Feb 5, 2013Cervilenz Inc.Devices and methods for cervix measurement
US8517960Jan 22, 2013Aug 27, 2013CervilLenz Inc.Devices and methods for cervix measurement
US8753303Sep 17, 2010Jun 17, 2014Boston Scientific Scimed, Inc.Delivery system having stent locking structure
WO1990010466A1 *Mar 9, 1990Sep 11, 1990Arrow Int InvestmentDual durometer epidural catheter
WO1993007926A1 *Oct 14, 1992Apr 29, 1993Imagyn Medical IncLinear eversion catheter system with extension control
WO1993023109A1 *May 13, 1993Nov 25, 1993Thierry BrinonSurgical instrument for epidural anesthesia
WO1996039077A1 *Jun 6, 1996Dec 12, 1996Corvita CorpEndovascular measuring apparatus, loading and deployment means
WO2002100270A1 *May 17, 2002Dec 19, 2002Cervilenz IncDevices and methods for cervix measurement
Classifications
U.S. Classification604/544, 600/587
International ClassificationA61B19/00, A61B5/107, A61M25/01
Cooperative ClassificationA61B5/1076, A61M25/0017, A61B2019/462, A61M25/01
European ClassificationA61M25/01, A61B5/107J, A61M25/00H
Legal Events
DateCodeEventDescription
May 4, 1993FPExpired due to failure to pay maintenance fee
Effective date: 19930221
Feb 21, 1993LAPSLapse for failure to pay maintenance fees
Sep 22, 1992REMIMaintenance fee reminder mailed
Jul 6, 1988FPAYFee payment
Year of fee payment: 4
Apr 18, 1983ASAssignment
Owner name: PROTECTAIR LIMITED, WATLINGTON, OXON, ENGLAND P.O.
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:YOUNG, DAVID E.;REEL/FRAME:004116/0742
Effective date: 19830330